Table of contents: Carburetor engines ↓ Injection engines ↓ Tank with absorber ↓ Thermal vacuum distribution valve…↓ Solenoid valve ↓
Carburetor engines
Examination
1. Disconnect the hoses from the tank and the thermal vacuum distribution valve (TVD) and blow out.
2. The TVR is screwed into the right side of the intake manifold. With the engine cold, disconnect both hoses from the TVR. Blow out the TVR by connecting an auxiliary hose to the fittings. Air should only pass through the TVR when the engine is warm.
3. The tank is mounted in the rear left part of the engine compartment.
4. Disconnect hose A from the tee side. With the engine running, create a vacuum on the hose - the engine speed should increase slightly, there should be no leakage in the hose. Reconnect the hose.
5. Disconnect hose C from the carburetor and blow it out with the engine running – there should be no leaks. Reconnect the hose.
6. Air cleaner pipe. Disconnect hose B from the manifold, blow through the hose and create a vacuum in the hose with the engine off – there should be no leakage. Reconnect the hose.
7. If during checks pp. 4–6 if a negative result appears, the tank should be replaced.
Injection engines
Examination
1. Disconnect all hoses from the reservoir and solenoid valve and blow out. The reservoir is mounted in the rear left side of the engine compartment. The valve is screwed into the rear of the intake manifold.
2. To check the tank, disconnect the hoses and blow into the A connector – air should not pass through. Air should pass freely through the B connector. Otherwise, replace the tank.
3. To check, remove the solenoid valve.
4. Air should flow freely only through ports A and C on a de-energized valve. If the valve is energized, air should flow only through ports A and B.
5. If the test results are negative, replace the valve.
Tank with absorber
Tank with absorber on injection engines
Replacement
1. Mark the route of each hose and the order in which the hoses are connected to the tank.
2. Loosen the clamps and disconnect the hoses.
3. Remove the tank from the bracket.
4. Install the tank in reverse order.
Thermal vacuum distribution valve (TVD)
Thermal vacuum distribution valve (carburetor engines)
TVR valve (indicated by the arrow) screwed into the suction manifold.
Replacement
Work is performed on a cold engine.
1. Drain the liquid to the valve level, or prepare a plug.
2. Disconnect the hoses from the TVR.
3. Carefully unscrew the TVR from the manifold, remove the gasket.
4. Install the TVR in reverse order. Replace the gasket.
Solenoid valve
Replacement
1. Remove the air duct.
2. Disconnect the battery from ground, disconnect the connector from the valve.
3. Mark the order of connecting the hoses on the valve.
4. Loosen the clamps and disconnect the hoses, remove the valve.
5. Install the valve in reverse order.